Improvement in friction-clutch pulley



H. K. SMITH, OFNORW'IGH, CONNECTICUT.

Letters Patent No'. 80,024, dated July 14, 1868.

4IMPROVEMENT 1N rsIcTIo'N-CLUTGH Putter. j

Elie Srlgrtale munt in in ilgrslrttrri lntmt :un making' mit nf tlgg same.

TO ALL WHO'M' I'l MAY CONQERN:

ABe it known that I, H. K. SMITH, of'Norwich, county of.New London, Aand State of Connecticut, have invented a new and useful Improvement -in Friction-Clutch Pulleys; and'I do-liereby declare that the following is a full, clear, and exact description thereof, which will 'enable others skilled inthe' -art to make and use 'the same, reference being had to the accompanying drawing, forming part of this specilication, in which it is shown that the following desirable points are obtained: V

First, that the huh or bearing of 'the pulley, while running loose, shallbe in a direct vertical line with the i face of the pulley, thereby producing an equal amount of wear at cachend of the huborxbearing of the pulley. f, Second, that when using two pulleys, as for reversing motion,the pulleysmay be brought near together, and also made perfectly smooth externally, and free from any liability to wind `up the beltwhen thrown ofi'.

Third, in being self-adjusting, always producing an equal amountof pressure on'cither side of the pulley. vFigure 1, in'the drawing, is au external' perspective view of a pair ci' pulleys, attached to a shaft, with conepulley, hangers, and shipper, as used forthe counter-sh`aft of an engine-lathe or other'machine, where it is desirable tb reverse the motion of the shaft.-

Figure 2 is a longitudinal section, taken in the plane of the lineyy. Figure 3 is a transverse vertical section, taken iti-the plane of the line L Lf Figure 4 is an end view of theshipperattachment,'showing the universal joint." Figures 5 and 6 are plans of the friction-pieces C C', seen in iig. 2 Figure 7 is a. plan/or top view of the lever l), sho-wn in fig. 2. Similar letters of reference indicate corresponding parts. y Although thedrawing represents two pulleys, it will onl-v be necessary to describe the parts landoperatio'n of one,as it is plain that the invention isos applicable to a single as a. double pulley.`

' .-G, in thc drawing, represents thershaft, which is lored hollow ,at one end,- in the direction: of its length,- a7 suiiicient distance to pass the place occupied by the pulley. p

B4 is a spider, with a long hiib, ,through which the hollow shaft 4Gris'fi-tted, and secured by the'set-screw O, or itis-equivalent. Y y

D is a lever, actingagainst the pieces C C', to move themnopposite directions. V

C C. are friction-pieces, which are-fitted loosely overthe protruding lateralarms K K of the spider B, havingopenings for the purpose, 'i' z" z' through which, also, the lever D passes, having bearing-points on it,-as 'shown ntN N, against-the `sides'oftheopening ,.each serving'as a fulcrum on which the' leverv D acts t0 move'ltheothe. l' i i Eis austelel pin,V passing in a vertical 'line through the rim of the spidcriB, and the opening o r Vslot in the end ofthe lever D,as seen at :v in lig. "7, andhavinga screw-'thread inthe nut J, (on which the end of the` lever D rests',) ,then'passng down-through the hub of the spider AB and` into-'the hollow shaft G, andV there resting on the'bottom of an incl-ined groove or indenture made in the sideof'the steel sliding bar or rod H, -the bottom of s'aid'groove or wnybeing of peculiar form, as' seen atM.`

A is the outer shellhorrpul'le'y proper, whose hub isfittedfover-and has its bearing on the hub of the spider B, (when running loose,) and the rim is turned out to pass freely over the segmental ends ofthe friction-pieces C C. P i's o. collar set. to the shaft, to prevent the pulley 'A ,from sliding oli' the hub of the spider Bi, when running loose. y Y n l R is the shipper-levenhung by al joint, in theusual manner, above the shaft,aud attached Ato the sliding bar or rod H, inthe holloiv shaft G, by means of a'universal joint, seen in gs. 1 and 4. A

l' Now,4it is plain to be seen that, by lnoving the shipper-lever R in thel proper direction, the sliding bar- H will, by means-'of'i-ts inclinedY groove-or way, M, ini connection`with the pin Eland nut J, raise the end ofthe vlever D, which will, by its peculiar arrangement in the openings 'z" z" in the friction-pieces C C', operate in .such a. manner as to force their segmental endsLo'ut in opposite directions, and thus cause them to iinpinge tightly against `the inner periphery of the pulley-,rim A, thus, by ineans .ofthe spiderB and yset-screw C, making theconnection,'aud causing the shaft G to revolve with vthe pulley A- y Also, that, hy azreverse motionv ofV the shipper-lever R, the action of the parts will be reversed, thus allowingthe pulley A' to revolve freely. on thehub o f the spider B, while theshaftG remains' at rest Also,in the case of a double pulley, as represented n the drawings, the shaftecan be putunder controlof 'the otherlpulley, and made to rotate in an oppos'tedirection,

Also, iffby wearing of the end of` the .pin E, or the bottom 'ofthe groove M, or byany other means, the

pressure of the friction-pieces C Cagainst the pulley A is not s'ucient to' drive the work required, the pin E,- l

by means of its slot in the-outer end, may be turned in such away as `to raise the nut J, on which the end of the lever D rests, whereby it will be seen that any amount of pressure may be obtained by 'the friction-pieces C C against the rur of :the pulley A, the nut Jbeiug .preventedfrom turning with the pin by.' the tivo sides of the opening a inL the arm'of the spider B,in which the nut is placed, 'and, b'y thc peculiar operation ofthe lever D in the opening'zf 'thez'two frietionspieces C C are each forced with equal pressure against the :im of thev pulley A, therefore requiring n o nice adjustment 'to cause an equal pressure ofn each side,

f I claim as new, and desire to secure hy Letters Patentl Il. The pin and nut' J, in connection with 4the levers Dj. 2. The friction-pulley, constructed and' arrangedsubstuntiallyas described and for the purpose specified.

V H. K. SMITH.

Witnesses:

GEO. L. CLARK,` GEORGE. SYMoNDs. 

